An object with a mass of #120 g# is dropped into #810 mL# of water at #0^@C#. If the object cools by #48 ^@C# and the water warms by #8 ^@C#, what is the specific heat of the material that the object is made of?

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Answer 1 · 2017-12-31T18:47:30

The specific heat is #=4.71 kJkg^-1K^-1#

The heat is transferred from the hot object to the cold water.

For the cold water, # Delta T_w=8ºC#

For the object #DeltaT_o=48ºC#

# m_o C_o (DeltaT_o) = m_w C_w (DeltaT_w)#

The specific heat of water #C_w=4.186kJkg^-1K^-1#

Let, #C_o# be the specific heat of the object

The mass of the object is #m_o=0.12kg#

The mass of the water is #m_w=0.81kg#

#0.12*C_o*48=0.81*4.186*8#

#C_o=(0.81*4.186*8)/(0.12*48)#

#=4.71 kJkg^-1K^-1#